You can already effectively block all sponsored segment through SponsorBlock. I imagine that if Youtube were to randomly "inline" ads in the stream they're deli

You can already effectively block all sponsored segment through SponsorBlock. I imagine that if Youtube were to randomly "inline" ads in the stream they're delivering to you, crowd-sourcing would also be an effective way to combat it. Make a "signature" of sorts of the video by pulling data from users and detect the ad bit on on your side using it. Well, that is if the ads come from the same domain as the legit video bits.